I tried to import a file I modeled in AutoCad but as I click the Exit button, the object is nowhere to be found.
Which import method are you using? The default “hard coded” import, or migius’ script?
Have you tried a different format, or an intermediate converter app? Did you model it with Acad solids?
I’ve tried importing .3ds and .obj. Though distorted/rescaled, at least, I can see the imported objects. Unlike in .dxf/.dwf, the scene is plain empty.
the best place to ask for help with importing DXF files is this thread:
And check if Accutrans imports the file in the correct manner - then save as a format that works well in Blender.